misc_systemd_units: Remove obsolete StandardOutput=syslog

On Ubuntu 20.10 with systemd 246, systemd warnings like below.

    Apr 23 08:57:24 flughafenberlinbrandenburgwillybrandt systemd[1]: /etc/systemd/system/mxvlan.service:10: Standard output type syslog is obsolete, automatically updating to journal. Please update your unit file, and consider removing the setting altogether.

So remove these obsolete entries, which are also obsolete in systemd 242
used in MarIuX.

systemd 246 introduced the warning:

>        * StandardError= and StandardOutput= in unit files no longer support
>          the "syslog" and "syslog-console" switches. They were long removed
>          from the documentation, but will now result in warnings when used,
>          and be converted to "journal" and "journal+console" automatically.

misc_systemd_units/dhcrelay.service

@@ -10,7 +10,6 @@ ConditionHost=bka.molgen.mpg.de
 
 ExecStart=/usr/sbin/dhcrelay -4 -d dhcp.molgen.mpg.de
 Restart=always
-StandardOutput=syslog
 
 [Install]
 

misc_systemd_units/getcams.service

@@ -5,6 +5,5 @@ Description=mxstartup baucamhttpd
 User=zmuser
 WorkingDirectory=/project/baucam
 ExecStart=/project/baucam/getcam.pl
-StandardOutput=syslog
 Restart=always
 RestartSec=10s

misc_systemd_units/mxvlan.service

@@ -7,7 +7,6 @@ Before=network.target
 [Service]
 Type=oneshot
 RemainAfterExit=yes
-StandardOutput=syslog
 ExecStart=/usr/sbin/mxvlanctl start
 ExecStop=/usr/sbin/mxvlanctl stop
 ExecReload=/usr/sbin/mxvlanctl restart

misc_systemd_units/network.service

@@ -11,7 +11,6 @@ ExecStart=/sbin/ip addr add ${MX_IPADDR}/20 broadcast 141.14.31.255 dev ${MX_NET
 ExecStart=/sbin/ip link set up dev ${MX_NETDEV}
 ExecStart=/sbin/ip route add default via 141.14.16.128
 ExecStop=/sbin/ip addr del ${MX_IPADDR}/20 dev ${MX_NETDEV}
-StandardOutput=syslog
 
 [Install]
 WantedBy=network.target